Synset

not in keeping with accepted standards of what is right or proper in polite society
<adj.all>   freq. cnt.: 3 freq. cnt.: 2 freq. cnt.: 1

indecent

indecorous

unbecoming

uncomely

unseemly

untoward

sample sentences

"was buried with indecent haste"
"indecorous behavior"
"language unbecoming to a lady"
"unseemly to use profanity"
"moved to curb their untoward ribaldry"